Dinosaur Fossils

Duck-Billed Dinosaur

Utah paleontologist Terry Gates holds the fossilized bill, left, and jawbone of a new species of a duck-billed dinosaur in front of an artist's rendition of the beast at a news conference Tuesday, Feb. 12, 2008, in the Utah Museum of Natural History at the University of Utah in Salt Lake City. The indentations in the jaw once held teeth. (AP Photo/Douglas C. Pizac)

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47,000,000-Year-...The 47 million-year-old fossilized remains of a creature are shown during a news conference at the American Museum of Natural History, Tuesday, May 19, 2009 in New York. The skeleton, from Germany, may help illuminate the early evolution of monkeys, apes and humans. (AP Photo/Mary Altaffer)

Tyrannosaurus "S...The fossil of Tyrannosaurus "Sue" is on display as the main exhibition of the Dinosaur Expo 2005 at the National Science Museum in Tokyo Monday, March 21, 2005. The organizer said it was the first overseas trip from Chicago's Field Museum by the most complete Tyrannosaurus rex fossil which was dug up in 1990 on a ranch in western South Dakota. The skeleton of "Sue," which is more than 90 percent complete, is 12.8-meter-long (42-foot-long) and the skull weighs 272 kilograms (600 pounds). (AP Photo/Koji Sasahara)

Cryolophosaurus ...The skull of a Cryolophosaurus ellioti looms over spectators at Tokyo's Marunouchi business district on Sunday, Feb. 22, 2009. The 7-meter-long meat-eating dinosaur, its fossils unearthed on the Antarctica, was on display ahead of a dinosaur exhibition at the National Science Museum. (AP Photo/Shizuo Kambayashi)

Uberabatitan Rib...A model of Uberabatitan Ribeiroi, a Late Cretaceous period dinosaur, is seen at the Federal University, in Rio de Janeiro, Wednesday, Sept. 24, 2008. Three specimens were found in different fossil sites of Uberaba County, in the Brazilian state of Minas Gerais. The Uberabatitan Ribeiroi, which lived in what is currently Brazil some 65 million years ago, had a length of more than 20 meters and weighed some 16 tons. (AP Photo/Silvia Izquierdo)

Duck-Billed Dino...Utah paleontologist Terry Gates holds the fossilized bill, left, and jawbone of a new species of a duck-billed dinosaur in front of an artist's rendition of the beast at a news conference Tuesday, Feb. 12, 2008, in the Utah Museum of Natural History at the University of Utah in Salt Lake City. The indentations in the jaw once held teeth. (AP Photo/Douglas C. Pizac)

Tyrannosaurus Re...The skeletal remains of "Jane", the nickname given to the juvenile Tyrannosaurus rex, is displayed at the Burpee Museum of Natural History in Rockford, Ill., Tuesday, June 28, 2005. Burpee officials hope the rare, unusually complete skeleton will put the museum on the map for tourists in the Midwest and beyond. (AP Photo/Charles Rex Arbogast)

Gigantoraptor Er...Journalists examine the replica of a fossilized skull, a small scale model and actual fossilized leg bones from the Gigantoraptor erlianensis, whose fossilized bones were uncovered recently in northern China at an unveiling held in Beijing, China, Wednesday, June 13, 2007. The remains of a giant, birdlike dinosaur at least 35 times the weight of similar species have been found in China, a surprising discovery that indicates a more complicated evolutionary process for birds than originally thought, scientists said Wednesday.(AP Photo/Ng Han Guan)

Fossilized EggsGeological Survey of India's former Director Arun Sonakia shows fossilized eggs of dinosaurs to media persons at Mandav, around 280 kilometers (175 miles) west of Bhopal, India, Monday, Feb. 5, 2007. Explorers have stumbled upon more than 100 fossilized eggs of dinosaurs belonging to the Cretaceous Era (approximately 144 to 65 million years ago), in Kukshi-Bagh area of Dhar district, of Madhya Pradesh according to a newspaper report. (AP Photo)

Bones to GoIn this photo released by China's Xinhua News Agency, a woman and her daughter walk by a dinosaur's fossil in a shopping mall of Taiyuan, capital of north China's Shanxi Province.

Tyrannosaurus Re...The skelton of a Tyrannosaurus rex stands in front of the barricaded work area in Dinosaur Hall at the Carnegie Museum of Natural History in Pittsburgh, Pa., Tuesday, March 22, 2005. Visitors to the Carnegie Museum of Natural History, which has one of the oldest and largest dinosaur collections in the nation, will be able to watch as the museum's collection of fossilized dinosaur skeletons are taken apart as part of a $35 million renovation of the museum's almost century-old Dinosaur Hall. (AP Photo/KeithSrakocic)

SupercrocUniversity of Chicago paleontologist and National Geographic Explorer-in-Residence Paul Sereno stands next to a skeletal cast of "supercroc," Friday, Nov. 16, 2001 at the National Geographic Society in Washington. Sereno unearthed the fossil of the 110-million-year-old, 40-foot, bus-sized prehistoric crocodile in Niger, Africa last year. (AP Photo/Rick Bowmer)

Fossilized Baby ...This fossilized baby dinosaur, dubbed Scipionyx samniticus, found in Italy during the 1980's, has proved to be so well-preserved that scientists can see muscle fibers and the intestine. The science journal Nature released this photo Wednesday March 25, 1998 of the dinosaur to go with an article in this month's edition by Cristiano Dal Sasso of the Museum of Natural History in Milan, Italy. The creature, from a previously unknown species, was a two-legged meat-eater that lived some 113 million years ago in what is now southern Italy. Little more than a hatchling, the creature might have measured only about 2 feet long from snout to the tip of its tail when it died. (AP Photo/Soprintendenza Archaeologica,Salerno)